B.J. Blazkowicz fights his way through a Nazi dig site and Undead-infested castle ruins in order to reach the site where Heinrich I was imprisoned 1000 years ago. Failing to stop Marianna Blavatsky from performing the dark ritual, Blazkowicz has no choice but to face the evil medieval prince in combat.

Eventually, Heinrich falls, which spells doom to Operation Resurrection and end the Nazis' evils plans for global domination.